If you are looking to perform certain task on swiping on the imageView or other widgets in android (the task may be change of activity, or change of the image on imageview). Here is the code snippet that can help you out with this.

Step 1:- Declare the variables

private GestureDetector gdt;
private static final int MIN_SWIPPING_DISTANCE = 50;
private static final int THRESHOLD_VELOCITY = 50;

Step:-2 Set touchListner on imageView:-

gdt = new GestureDetector(new GestureListener());
imageView.setOnTouchListener(new View.OnTouchListener() 
   {
       @Override
        public boolean onTouch(final View view, final MotionEvent event) {
        gdt.onTouchEvent(event);
        return true;
    } });

Step:-3:- Create class GestureListener that extend GestureDetector.SimpleOnGestureListener

private class GestureListener extends GestureDetector.SimpleOnGestureListener 
 {
   @Override
   public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) 
     {
       if (e1.getX() - e2.getX() > MIN_SWIPPING_DISTANCE && Math.abs(velocityX) > THRESHOLD_VELOCITY)
         {
           Toast.makeText(getApplicationContext(), "You have swipped left side", Toast.LENGTH_SHORT).show();
           /* Code that you want to do on swiping left side*/
           return false;
          } 
       else if (e2.getX() - e1.getX() > MIN_SWIPPING_DISTANCE && Math.abs(velocityX) > THRESHOLD_VELOCITY) 
         {
          Toast.makeText(getApplicationContext(), "You have swipped right side", Toast.LENGTH_SHORT).show();
          /* Code that you want to do on swiping right side*/
          return false; 
         } 
       return false;
      }
   }